Relocating heater intake duct inside cab?

[bones1]

Wouldn't it be better to move the 4in intake heat duct inside the cab, let it recirculate instead of pulling cold air from outside the truck, thru the heater core and then in the cab.

 

[islandguydon]

It would, but there is something to be said about positive pressure. There is no energy loss or difference in fuel consumption. IMHO

 

[bones1]

Island, are we on the same page?.

 

[73m819]

This is my plan for the 819 when ever I reinstall the heater in the cab

 

[Tlauden]

Yes But on the same proncipal as the engine air intake, on the deuce the heater intake has the scoop, so in theory it's getting air pushed through the system right?? It would seem that moving the heater intake inside (losing the scoop and already movin air) would make the heater less effective? No?

Or am I over thinking the whole system?? Lol

 

[RAYZER]

Wouldn't it be better to move the 4in intake heat duct inside the cab, let it recirculate instead of pulling cold air from outside the truck, thru the heater core and then in the cab.

Seems like the cab heater would be more efficient that way,its how most other vehicle heaters are ducted. I think.

 

[hklvette]

Seems like the cab heater would be more efficient that way,its how most other vehicle heaters are ducted. I think.

Not always. If you're simply heating the cab, recirculating the air works very well. On the other hand, if you're to defrost you are better off using the outside air, as the humidity is likely lower.

 

[rosco]

I changed mine long ago. It gives your heater a chance to re-heat warm air, instead of trying to start new, trying to warm -40 F air. I'm not sure the ram air effect is measureable anyway.

 

[Bob H]

Hmmmm.........
Wonder where the air intake is on the A3?

 

[AN/ARC186]

Ram air?? Your trucks go fast enough to have ram air???

Moving the intake to inside is a great idea, you could also install a y damper and mix inside and outside air at whatever ratio you wanted.

 

[rlwm211]

I have found that pulling the "aiir" control out about half way will increase the temperature of the air being distributed in the cab from the under hood heater. This really makes a difference with the defroster as well.

I am planning to apply foam gasket tape around the core in the heater box under the hood. Mine flops around which means as much air is probably bypassing the heater core as passing through it.

The other essential if you want heat from the deuce in winter weather whether the heater is located under the hood or in the cab is to have a winter front.

That, in my humble opinion, makes the largest difference in how well the heater works.

RL

 

[bones1]

Great replies guys. Rosco, do you have any pictures of your conversion?.

 

[royaltiger1945]

I don't no about where you live, but the biggest problem out here is the dust from dirt roads. By having an intake on the outside, fresh air is pulled from outside and the cab is pressurized some, hence positive pressure, and that helps prevent dust infiltration even on a soft top vehicle, unless of course you are pulling in a cloud of dust from someone in front of you. By pulling from inside, you start to create a negative pressure, like a vacuum, as the system is pulling from inside the cab and that allows dust to be sucked into the cab. I would try to figure out a way that would allow either option to be used, but that is just my opinion as I live in an area that tends to be cold and dry during the winter.

However, it will definitely help warm things up faster.

 

[doghead]

The stock (air from outside) intake also helps force fresh air into the cab, and keeps you healthy and alive.

 

[73m819]

The stock (air from outside) intake also helps force fresh air into the cab, and keeps you healthy and alive.

The way most MV cabs leak air, I would never think that would be a problem

 

[SMOKEWAGON66]

The way most MV cabs leak air, I would never think that would be a problem

LOL...so seeing daylight between the windshield seals, door seals, and even some through the floor is normal?

 

[bones1]

LOL...so seeing daylight between the windshield seals, door seals, and even some through the floor is normal?

10-4. I still have the hood up thinking about it. It would be real easy to do.

 

[islandguydon]

Yes But on the same proncipal as the engine air intake, on the deuce the heater intake has the scoop, so in theory it's getting air pushed through the system right?? It would seem that moving the heater intake inside (losing the scoop and already movin air) would make the heater less effective? No?

Or am I over thinking the whole system?? Lol

Air scoop, since when does a Deuce run that fast down the road to make any difference anyway...?

 

[Boatcarpenter]

Put the whole heater in the cab. Makes it much warmer and a lot easier to get to the IP, filters etc.
BC

 

[patracy]

I mounted an M151 heater inside my cab on my M35A2.